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A malleable cast iron metal material of malleable iron and steel and its production process

A metal material and production process technology, applied in the field of forging, can solve the problems of low oxidation resistance, high production cost, long heat treatment time, etc., and achieve the effect of excellent overall performance, high mechanical strength and small internal stress of the product

Active Publication Date: 2021-07-20
济南市平阴县玛钢厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of low high-temperature oxidation resistance, long heat treatment time and high production cost of black-heart malleable cast iron in the prior art, the purpose of the present invention is to provide a black-heart malleable iron metal material and its production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A malleable cast iron metal material of malleable black heart, comprising the following raw materials in mass percentage: 2.4% carbon, 1.8% silicon, 0.01% barium, 0.12% calcium, 0.2% aluminum, 0.6% manganese, sulfur < 0.15%, phosphorus < 0.06%, chromium < 0.06%, the balance is iron.

Embodiment 2

[0052] A malleable cast iron metal material made of malleable steel, comprising the following raw materials in mass percentages: 2.6% carbon, 1.6% silicon, 0.06% barium, 0.14% calcium, 0.5% aluminum, 0.8% manganese, sulfur < 0.15%, phosphorus < 0.06%, chromium < 0.06%, the balance is iron.

Embodiment 3

[0054] A malleable cast iron metal material of malleable black heart, comprising the following raw materials in mass percentage: 2.5% carbon, 1.7% silicon, 0.05% barium, 0.13% calcium, 0.3% aluminum, 0.7% manganese, sulfur < 0.15%, phosphorus < 0.06%, chromium < 0.06%, the balance is iron.

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Abstract

The invention discloses a malleable cast iron metal material and a preparation method thereof, wherein the malleable steel material includes the following raw materials in mass percentage: 2.4-2.6% of carbon, 1.6-1.8% of silicon, 0.01-0.06% of barium, 0.12-0.14% of calcium, aluminum 0.2‑0.5%, manganese 0.6‑0.8%, sulfur<0.15%, phosphorus<0.06%, chromium<0.06%, and the balance is iron; the malleable cast iron metal material of malleable steel black heart of the present invention is a new type of malleable steel material, Grade KTH400‑8, that is, black-centered malleable cast iron with a minimum tensile strength of 400MPa and a minimum elongation after fracture of 8%; the composition is novel, the manufacturing process is reasonable and clear, the graphite is evenly distributed, there are no flake graphite spots on the surface, and the mechanical strength is high.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a malleable cast iron metal material of malleable iron and steel and a production process thereof. Background technique [0002] Cast iron can be divided into flaky graphite cast iron, nodular cast iron and black-heart malleable cast iron according to the state of carbon, among which black-heart malleable cast iron is widely used for impact or vibration and torsional load parts due to its excellent mechanical strength, such as manufacturing automobile rear axles, spring brackets, Low-pressure gates, pipe joints, tool wrenches, etc. However, since the cast iron material is an iron-based material, oxidation reactions are prone to occur in the high temperature range, and the oxidation resistance is not high. In the prior art, nickel is added to increase its oxidation resistance, but because of the high cost of nickel, the range of use is limited. In addition, because graphite is eq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C37/06C22C33/08C21D1/26
CPCC21D1/26C21D2211/005C21D2211/006C22C33/08C22C37/06C22C37/10
Inventor 张进军邹耀文夏家旭
Owner 济南市平阴县玛钢厂